Visible light attenuation

Use is made of materials such as acrylic that are very clear. They have very little light absorption in the visible spectrum, and have a very low haze level to scatter the light and change direction. The light can be piped over distances of the order of three to four meters with a minimum of light attenuation. 

Many molecules absorb ultraviolet or visible light. The absorbance of a solution increases as attenuation of the beam increases. Absorbance is... 

Photo-electric effect no yes liquids, powders, granular solids. Electromagnetic signal in visible light or infra-red region of electromagnetic spectrum is sensed by photo-electric cell. Beam is attenuated by liquids and cut off by solids. Liquids can transmit or reflect the beam. 

A dichroic beamsplitter reflects the ultraviolet third harmonic pulse, used for excitation, while transmitting the first and second harmonics. Filters are placed in the excitation beam to eliminate visible light leakage and to attenuate the ultraviolet beam to an appropriate energy, which corresponds typically to... 

DOM contains many nonidentical chromophores, whose collective attenuation of incident UV and visible light causes the absorbance of DOM to... 

KzX is usually expressed per meter and depends on wavelength and water composition. Typically, ultraviolet radiation penetrates less deeply than visible radiation. Attenuation coefficients vary over many orders of magnitude in natural waters, with the highest values (least light penetration) in inland water bodies and the lowest values (highest penetration) in open seawater. The photic zone for solar ultraviolet radiation, which is very important for halocarbon photoreactions, ranges from tens of meters in the open ocean and clear lakes to only a few centimeters in some inland wetlands. The spectral properties of water bodies are linked to water composition. Baker and Smith (20) developed algorithms that relate K,k to certain parameters such as chlorophyll a concentrations. 

Electromagnetic radiation penetrates much deeper into matter than do charged particles. Attenuation of gamma rays in matter follows an exponential law, similar to the Beer-Lambert law for absorption of visible light. To decrease the intensity of a 1.0-MeV parallel beam of gamma rays to one-half its original value requires a... 

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